Similarweb Ltd.

SMWB

Exchange: NYSE
Industry: Services-Computer Programming, Data Processing, Etc.
SEC CIK: 0001842731

SEC filings (opens in a new tab)

In the last 90 days, Similarweb Ltd. insiders filed 0 open-market purchases and 9 sales; 70 institutions reported holding it in 13F filings for Q2 2026, worth $312.1M in total; ARK Invest is the only superinvestor holding it.

Key figures

Market capADS ratio not in SEC data: –
Insider buysOpen market, last 90 days: 0
Insider sellsLast 90 days, $15.2M in total: 9
13F holdersQ2 2026, −10 vs. previous quarter: 70
13F valueReported value at the end of Q2 2026: $312.1M
Superinvestors holdingAt the end of Q2 2026: 1

Price chart

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Financials

See financial statements

From SEC filings, in USD.

Revenue, FY2025: $282.6M; +13.1% year over year
Net income, FY2025: -$32.9M; No comparable prior period
Free cash flow, FY2025: $13.2M; −54.2% year over year

Revenue flow, FY2025

Green is profit; orange is costs, expenses and taxes. Percentages are shares of revenue.

Net loss for FY2025: $32.9M (11.7% of revenue).

Short interest

See short data

From FINRA, settlement date Oct 30, 2026.

Short interest: 595.4K; Shares sold short
Change: −245.4K; −29.2% vs. previous
Days to cover: 1.60; At average daily volume

Superinvestors holding SMWB, Q2 2026

Go to the superinvestors tab

1 superinvestor reports holding Similarweb Ltd. on Form 13F. Percentages are the stock's share of each portfolio.

ARK Invest

Cathie Wood

<0.1%

Similarweb Ltd.'s share of the portfolio

Shares: 834,663
Value: $5.12M

Latest insider trades

See all insider trades

Open-market purchases and sales by Similarweb Ltd. insiders from Form 4, newest first.

Insider trades
Filed (ET)	Trade date	Filing delay	Insider	Transaction	Shares	Avg price	Value	Holding change	Flags
Sep 25, 2026 (view filing)7:46 AM ET	Sep 24	1 day	Offer OrChief Executive Officer	SSale	−114.3K	$7.69	−$879.1K	−2.8%3.93M after	2 lots10b5-1
Sep 24, 2026 (view filing)7:56 AM ET	Sep 22-23	2 days	Offer OrChief Executive Officer	SSale	−62.9K	$8.45	−$531.4K	−1.5%4.04M after	2 lots10b5-1
Sep 22, 2026 (view filing)7:43 AM ET	Sep 18-21	4 days	Offer OrChief Executive Officer	SSale	−69.7K	$8.32	−$579.9K	−1.7%4.11M after	2 lots10b5-1
Sep 18, 2026 (view filing)6:13 AM ET	Sep 16-17	2 days	Offer OrChief Executive Officer	SSale	−76.1K	$8.38	−$637.6K	−1.8%4.18M after	2 lots10b5-1
Sep 16, 2026 (view filing)9:07 AM ET	Sep 14-15	2 days	Offer OrChief Executive Officer	SSale	−79.6K	$8.53	−$679.2K	−1.8%4.25M after	Amended2 lots10b5-1Duplicate filing
Sep 16, 2026 (view filing)7:01 AM ET	Sep 14-15	2 days	Offer OrChief Executive Officer	SSale	−79.6K	$8.53	−$679.2K	−1.8%4.25M after	2 lots10b5-1Duplicate filing
Sep 16, 2026 (view filing)6:55 AM ET	Sep 14-15	2 days	Offer OrChief Executive Officer	SSale	−79.6K	$8.53	−$679.2K	−1.8%4.25M after	2 lots10b5-1
Sep 14, 2026 (view filing)9:07 AM ET	Sep 10-11	4 days	Offer OrChief Executive Officer	SSale	−118.2K	$8.06	−$952.2K	−2.7%4.33M after	2 lots10b5-1
Sep 10, 2026 (view filing)9:28 AM ET	Sep 8-9	2 days	Offer OrChief Executive Officer	SSale	−147.0K	$8.17	−$1.20M	−3.2%4.45M after	2 lots10b5-1
Aug 27, 2026 (view filing)8:03 AM ET	Aug 26	1 day	Offer OrChief Executive Officer	SSale	−383.1K	$9.00	−$3.45M	−7.7%4.60M after	4 lots

Top 10 13F holders, Q2 2026

See all 70 holders

The largest institutional positions in Similarweb Ltd. at the end of Q2 2026; share changes are against Q1 2026.

Institutions holding SMWB in Q2 2026
Institution	Shares	Value	% of portfolio	Change in shares	Action
Naspers Ltd	11,173,265	$68.5M	81.19%	00.0%	Unchanged
Viola Growth Management Fund 2 Ltd.	10,810,778	$66.3M	88.48%	+10,810,778	New
Menora Mivtachim Holdings Ltd.	4,015,494	$24.6M	0.10%	00.0%	Unchanged
Wellington Management Group LLP	3,624,685	$22.2M	0.00%	+657,928+22.2%	Added
ION Crossover Partners Ltd	3,030,826	$18.6M	24.88%	00.0%	Unchanged
Ulysses Management LLC	2,928,474	$18.0M	6.21%	−70,000−2.3%	Reduced
S Squared Technology, LLC	1,690,000	$10.4M	3.21%	+90,000+5.6%	Added
Schonfeld Strategic Advisors LLC	1,210,629	$7.42M	0.04%	+921,455+318.7%	Added
Y.D. More Investments Ltd	1,147,035	$7.03M	0.22%	−4,263−0.4%	Reduced
ARK Investment Management LLCSuperinvestorARK Invest	834,663	$5.12M	0.03%	+482,593+137.1%	Added

Holders of 5% or more of SMWB

See all 1 holders and filings

Holders whose latest Schedule 13D or 13G filing reports 5% or more of Similarweb Ltd..

Largest holders of SMWB from 13D and 13G filings
Holder	Latest form	Stake	Change	First filed	Latest filing	Filing
Viola Growth Management Fund 2 Ltd.	13G/A	13.20%10.8M shares	–	Feb 14, 20223 filings	Feb 12, 2025	SEC